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Finding the Fourth Proportional to 421,828.40, 632,051.40 and 359,620.40

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Solution

The fourth proportional to 421,828.40, 632,051.40 and 359,620.40 is: 538,841.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,828.40 : 632,051.40 = 359,620.40 : x
  2. Step 2: Convert to fraction form
    421,828.40/632,051.40 = 359,620.40/x
  3. Step 3: Cross multiply
    421,828.40x = 632,051.40 × 359,620.40
  4. Step 4: Simplify right side
    421,828.40x = 227,298,577,288.56
  5. Step 5: Solve for x
    x = 227,298,577,288.56/421,828.40
  6. Step 6: Final answer
    x = 538,841.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.